Malicious PDF — malware analysis report

Static analysis result for SHA-256 2721f4f75614fcee…

MALICIOUS

PDF

66.4 KB Created: 2021-02-25 21:15:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: dcd98ea46b86a11e1ef76d3dfff2b552 SHA-1: 8ed29e009ffb97ecd5ecdd368e68c7347edee88b SHA-256: 2721f4f75614fcee43b860911404fc3783d21b64f43d89399217c6ba52a8e351
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jacksth.ru/award?keyword=sound+blaster+evo+zx+software PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456166/normal_5feb6bf15de42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480748/normal_600c57d048112.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485322/normal_5ff97c84044fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473890/normal_5fdb605016beb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466680/normal_5fecc4a0f3581.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412890/normal_5fdf8d1a51dc2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501495/normal_5fcbc505a5583.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/zdDhgKL/hack_world_of_bingo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370284/normal_5ffd267380f40.pdfIn PDF document text
    • http://bezigex.iblogger.org/bejurajujunevejuboraxek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386347/normal_5fce5eda0cc97.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bipofixijanafuf.rf.gd/25533951216.pdfIn PDF document text
    • http://romamosok.rf.gd/25668595916.pdfIn PDF document text
    • http://gazozan.epizy.com/13968027161.pdfIn PDF document text
    • http://pikiregofi.epizy.com/manual_de_agrometeorologia.pdfIn PDF document text
    • http://lezujepadu.rf.gd/intracranial_fusiform_aneurysm.pdfIn PDF document text
    • http://nedugone.epizy.com/90423341426.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC719 5412 bytes
SHA-256: 632353d125af29753fb9b7514a0d8e68a5fece989ac02247abe9f21fb059b017
font_01_sfnt_off0000d9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AE 10224 bytes
SHA-256: 9a0bdaf30ada5766b2f533787bcb55d1ec68a0014538837b0460a3323d22b6f2